Compare to identical examples of the Yongzheng period, cf. the waterpot from the Wang Xing Lou Collection, illustrated in Imperial Perfection, Hong Kong, 2004, p. 104-5, no. 36; and another sold at Sotheby's Hong Kong, 29th November 1976, lot 576. A related waterpot of the same shape and pattern, utilising the iron-red rather than underglaze-blue as the main decorative motif against a white ground, from the Nanjing Museum collection was included in the exhibition Qing Imperial Porcelain, The Chinese University of Hong Kong, 1995, and illustrated in the Catalogue, no. 1995, pl. 61.